Media Manager opens with error

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Errors reported[edit]

Error Property 'mime_type' of argument 'item' of event onFetchMediaItems has a wrong item. Valid: string

Versions affected[edit]

General Information

This pertains only to Joomla! version(s): 4.3.0, 4.3.1

What is the cause[edit]

This is caused by your server missing the php module fileinfo

How to fix[edit]

Request that your hosting provider enables the fileinfo module in php